Daffy F said:
What is Plantar Fascitis?
The large tendon on the bottom of your foot is your plantar fascia. Plantar fasciitis is the inflammation of that tendon. It's very painful (feels like you're walking on an intense bruise) and takes a relatively long time to heal.
I had a very bad case of it once and it forced me to cease from running (where I had been running 8 miles a day) for two months. I waited a long time before going to a doctor and had kept running with it for a long time until the pain became unbearable, normal recovery doesn't last quite that long.
If you're planning on going barefoot, I suggest looking up tips to help keep your feet healthy. It's something you don't think about until it hurts, but it is sooo frustrating.